Packing for pistons



Sept. 4,1923; 1,467,113

'T- A.'ME`YERS f `PACKING Eon PIsToNs t0n-rod and an ordinarystuffing-box, and

Patented Sept. 4, 1923.

UNITED `STATES .THEODORE A. MEYERS, OF TOLEDO, OHIO.

PACKING FOR PISTONS.

Application lled April 15, 1921.

To all whom t may concern):

Be it known that I, THEoDoRE A. Mareas, a citizen of the United States,residing at Toledo, in the county of Lucas and State of Chio, haveinvented certain new and useful Improvements in Packings for Pistons;and I do declare the following to be a full, clear, and exactdescriptionn of the invention, such as will enable others skilled in theart to which it appertains to make and use the same, reference being hadto the accompanying drawings, and to the letters of reference markedthereon, which form a part of this specification.

My invention relates to new and useful improvements in packing forpiston-rods, valve-stems, plungers and similar structures, and isdesigned to furnish a simple and eficient packing which will not onlyprovide a joint or joints which completely prevents the escape of liuidsaround or through the packing, but which will accommodate itself to theirregularities of worn or scored surfaces with which it may come incontact. My packing is also designed to provide a degree of resiliencywhich adapts itl for a considerable range of variation in the sizes ofthe annular chambers in which the packing may be employed, as well aschanges due to contraction and expansion.

With these and other objects and advantages in view, my inventionconsists of the devices, construction and arrangement of partshereinafter described, and illustrated in the accompanying drawings, inwhich- Figure 1, is a central, longitudinal, sectional view of mypacking applied to a pis- Fig. 2, a perspective view of a short Sectionof one of my packing-rings, detached.

My packing is formed preferably in elongated strips which are dividedinto suitable lengths to encircle, as a ring, the rod to be packed.Viewed in cross-section, my packing may be considered as consisting oftwo principal parts, namely. the rectangular portion a and the portionb, which is of the same width as the part a and wliichis preferabl)Tarched as shown. The part may. for con,- venience. be termed thecushion. The part A a is built up of superposed layers of rubberizedfabrics, the layers being closely conipressed together. The fabric mayconsist of any suitable fibrous material. as. for instance` cotton duck.asbestos. flax. hemp` jute or the like. woven or braided. dependingSerial No. 461,545.

upon the nature of the Huids to be confined, whether water, steam,acids, gases or other iuids, as well as the degree of temperature towhich the packing is to be subjected. The part b is composed of the samematerial, wound or fashioned in such manner as to leave a longitudinalcentral tubular opening o therethrough. Throughout the length of thisopening is a closely fitting, iexible, heat and oil-resisting tube d.This tubing is readily obtainable upon the market, but I am unable hereto explain its composition. The oice of this tube is to lend resiliencyto the cushion part as well as to aid in maintaining the cross-sectionalcontour of the packing-rings.

The part a of the packing is divided diagonally, as at e, so that whenthe packingrings are under compression, the inner and the outertriangular portion f-g, will slide upon each other in wedge-likefashion, which will spread them apart in the annular space around thepiston and effecting their movement in the direction of the length ofthe piston. Thus each member or part of the packing-ring contributes tothe elastic transverse spreading of the ring, internally and externally,and to the close contact of the rings with the opposed surfaces of thepiston andthe stuffing-box.

The several parts above described are wrapped and held assembled inoperative relation by means of a light fabric, woven or braided, ofsuitable material, such as cotton yarn or asbestos, depending upon theservice for which the packing is designed. The several packing-rings aredisposed with the flat sides h of the triangular portions g turned inthe direction of the gland or follower ofthe stuffing-box. so that,under com pression` the cushions of the successive rings will contactwith the surfaces L of the adjacent rings.

The lubricants to be employed with vmy packing, such as oils, greases,mica or graphite, or mixtures of the same. are a matter of selection.and will vary under different conditions of temperature` and with thedifferent Huids to be conned. as will be understood by those skilled inthe art without explanation in this specification.

Having described my invention, what I claim and desire to secure byLetters Patent of thenited States. is`

l. An expansible packing embodying a resilient section provided with achninbered rubber core, and parallel therewith a pair of relativelyslidable sections coacting for relative shifting in effecting oppositepackin".

5. An expansible packing embodying a resilient section provided with acliambered core, a. fabric body section about said core, and relativelysliftable triangular sections movable as to the resilient section.

3. An expansible packing embodyingr a resilientsection provided with atubular rubber core. a pair of parallel fabric body triangular sections,and a jacket for assembling said sections as a unit.

